org.apache.calcite.schema.impl

Class ViewTable

java.lang.Object

org.apache.calcite.schema.impl.AbstractTable

org.apache.calcite.adapter.java.AbstractQueryableTable

org.apache.calcite.schema.impl.ViewTable

All Implemented Interfaces:

QueryableTable, Table, TranslatableTable

Direct Known Subclasses:

MaterializedViewTable

public class ViewTable
extends AbstractQueryableTable
implements TranslatableTable

Table whose contents are defined using an SQL statement.

It is not evaluated; it is expanded during query planning.

Field Summary

Fields inherited from class org.apache.calcite.adapter.java.AbstractQueryableTable

elementType

Constructor Summary

Constructors

Constructor and Description
ViewTable(Type elementType, RelProtoDataType rowType, String viewSql, List<String> schemaPath)

Method Summary

Methods

Modifier and Type	Method and Description
<T> Queryable<T>	asQueryable(QueryProvider queryProvider, SchemaPlus schema, String tableName) Converts this table into a Queryable.
Schema.TableType	getJdbcTableType() Type of table.
RelDataType	getRowType(RelDataTypeFactory typeFactory) Returns this table's row type.
List<String>	getSchemaPath() Returns the the schema path of the view.
String	getViewSql() Returns the view's SQL definition.
RelNode	toRel(RelOptTable.ToRelContext context, RelOptTable relOptTable) Converts this table into a relational expression.
static org.apache.calcite.schema.impl.ViewTable.ViewTableMacro	viewMacro(SchemaPlus schema, String viewSql, List<String> schemaPath) Table macro that returns a view.

Methods inherited from class org.apache.calcite.adapter.java.AbstractQueryableTable

getElementType, getExpression

Methods inherited from class org.apache.calcite.schema.impl.AbstractTable

getStatistic

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.apache.calcite.schema.Table

getStatistic

Constructor Detail

ViewTable

public ViewTable(Type elementType,
         RelProtoDataType rowType,
         String viewSql,
         List<String> schemaPath)

Method Detail

viewMacro

public static org.apache.calcite.schema.impl.ViewTable.ViewTableMacro viewMacro(SchemaPlus schema,
                                                                String viewSql,
                                                                List<String> schemaPath)

Table macro that returns a view.

getJdbcTableType

public Schema.TableType getJdbcTableType()

Description copied from interface: Table

Type of table.

Specified by:

getJdbcTableType in interface Table

Overrides:

getJdbcTableType in class AbstractTable

getRowType

public RelDataType getRowType(RelDataTypeFactory typeFactory)

Description copied from interface: Table

Returns this table's row type.

This is a struct type whose fields describe the names and types of the columns in this table.

The implementer must use the type factory provided. This ensures that the type is converted into a canonical form; other equal types in the same query will use the same object.

Specified by:

getRowType in interface Table

Parameters:

typeFactory - Type factory with which to create the type

Returns:

Row type

asQueryable

public <T> Queryable<T> asQueryable(QueryProvider queryProvider,
                           SchemaPlus schema,
                           String tableName)

Description copied from interface: QueryableTable

Converts this table into a Queryable.

Specified by:

asQueryable in interface QueryableTable

toRel

public RelNode toRel(RelOptTable.ToRelContext context,
            RelOptTable relOptTable)

Description copied from interface: TranslatableTable

Converts this table into a relational expression.

Specified by:

toRel in interface TranslatableTable

getViewSql

public String getViewSql()

Returns the view's SQL definition.

getSchemaPath

public List<String> getSchemaPath()

Returns the the schema path of the view.